Simple Rules, easy to implement, not too complicated. - Cause you guys are limited on coders.
Free power - where only energy is required to get power levels. - Most power wins the season.
No Terminal like mentioned would be interesting.
No Labs and/or no(less) towers.
Cheap War - HEAL/RANGE_ATTACK/ATTACK are a lot cheaper.
Faster Building - parts take 1 tick instead of 3.
Pure Economics - No ATTACK/HEAL/RANGED_ATTACK, faster GCL levels. Highest Controller Upgrade Score wins.
Smaller Shards like 20 North/west/south/east and like 3 shards. Shard 0 starts with the most score generated, other shards open up as player get wiped from the previous shard. With shard2 being the last that newbies can be in to play against each other, but also has the least score generated.
This will at least make bigger and higher level players forced against each other for space, and each shard will have players that are more equal. Look at how the map now, and imagine if the last circle was gone and only the top 10 players were in a tigher space, it would force them to play against each other.